SOLAR STILL AND SOLAR POWERED STREET LIGHTS WITH CLOUD BASED MONITORING

Abstract

This project presents the design and implementation of an integrated, solar-powered system that addresses two critical needs: water purification and public lighting. The core innovation lies in a smart solar still equipped with an automated sun-tracking mechanism. This system utilizes DHT11 sensors to monitor internal and external temperatures, with data processed by a Node MCU IoT module. A key feature is the ability to manually control a motorized disc, which rotates the entire still structure for optimal solar alignment, via commands sent from the Blynk mobile application. This active orientation control, based on real-time sensor data, significantly enhances the evaporation and condensation process within the single-basin structure.

Alongside the water purification system, the project incorporates autonomous street lighting. Energy-efficient LED street lights are powered by the same renewable energy infrastructure, ensuring illumination during nighttime hours. The entire setup is powered by a dedicated solar energy subsystem, which includes a solar panel, a 6V rechargeable battery for energy storage, and necessary power regulation circuitry comprising a step-down transformed and rectifier. This ensures complete operational independence from the conventional power grid.

Unifying the system is a robust cloud-based monitoring and control framework. The Node MCU transmits all sensor data, including temperature and humidity readings, to the Blynk cloud platform. The project successfully demonstrates a holistic model where renewable energy, IoT-based automation, and cloud connectivity converge to create a sustainable and intelligent solution for essential utilities, providing a scalable prototype for off-grid and smart-city applications.